Big win for Lenny Dykstra despite the fact he plead GUILTY in his crazy Uber case -- after a New Jersey judge ruled the drugs found in Lenny's bags could NOT be used as evidence against him. 

Here's the story ... Dykstra was arrested back in My 2018 after an Uber driver claimed Lenny was acting crazy and threatened his life during an early morning ride. 

During the arrest, cops say they found cocaine and meth in Lenny's bags -- which had been in the trunk. He was later charged with possession of coke and meth and making terroristic threats.